BC Bonsai Society provides this Bonsai Calendar.pdf which shows when to work on your trees, fertilize and other care tasks. It is a useful reference for the types of tasks you should complete each month. The timing is based on the climate in the BC Lower Mainland and should be adjusted if you live elsewhere.
Each species requires different care, and when you are learning it is good advice to limit yourself to about five species so tree care does not become too complicated. There are good websites available with instructions for individual species care such as: bonsai4me.com/species_guide.html. You can look your trees up on these websites and learn how to take care of the species you have. Some members find it helpful to record their annual care routine in a journal, so they recall what needs to be done in each month of the year.
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